Home / 12,679.36-18,971.52-10,489.12

Finding the Fourth Proportional to 12,679.36, 18,971.52 and 10,489.12

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Solution

The fourth proportional to 12,679.36, 18,971.52 and 10,489.12 is: 15,694.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,679.36 : 18,971.52 = 10,489.12 : x
  2. Step 2: Convert to fraction form
    12,679.36/18,971.52 = 10,489.12/x
  3. Step 3: Cross multiply
    12,679.36x = 18,971.52 × 10,489.12
  4. Step 4: Simplify right side
    12,679.36x = 198,994,549.86
  5. Step 5: Solve for x
    x = 198,994,549.86/12,679.36
  6. Step 6: Final answer
    x = 15,694.37

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.